RN 120 is a powerful bicycle tail light with convenient USB rechargeable, the max output can be reached up to 120 lumens, breaking through design conception, brings you 260°visibility. All in one design bike tail light suitable for road, urban, and daily commuting. The built-in light sensor automatically adjusts the brightness according to ambient lighting conditions. Thus to increase warning effect efficiently during day and night. RN 120 is easy to be mounted under saddle on different seat posts.